docs: Refactoring and min PHP version bumped to 8

CONTRIBUTING.md

@@ -9,7 +9,7 @@ Make sure your request is meaningful and you have tested the app locally before
 
 #### Requirements
 
-* [PHP 7.4+](https://www.apachefriends.org/index.html)
+* [PHP 8.0+](https://www.apachefriends.org/index.html)
 * [Composer](https://getcomposer.org)
 * [Imagick](https://www.php.net/imagick)
 

README.md

@@ -186,7 +186,7 @@ Make sure your request is meaningful and you have tested the app locally before
 
 #### Requirements
 
-- [PHP 7.4+](https://www.apachefriends.org/index.html)
+- [PHP 8.0+](https://www.apachefriends.org/index.html)
 - [Composer](https://getcomposer.org)
 - [Imagick](https://www.php.net/imagick)
 

composer.json

@@ -18,7 +18,7 @@
     ]
   },
   "require": {
-    "php": "^7.4|^8.0",
+    "php": "^8.0",
     "ext-imagick": "*",
     "vlucas/phpdotenv": "^5.3"
   },

src/card.php

@@ -2,47 +2,6 @@
 
 declare(strict_types=1);
 
-/**
- * Set headers and echo response based on type
- *
- * @param string|array $output
- * @return void
- */
-function renderOutput(string|array $output): void
-{
-    $requestedType = $_REQUEST['type'] ?? 'svg';
-
-    $card = gettype($output) === "string" ? generateErrorCard($output) : generateCard($output);
-
-    if ($requestedType === "json") {
-        $data = gettype($output) === "string" ? array("error" => $output) : $output;
-        echoAsJson($data);
-        exit;
-    }
-
-    if ($requestedType === "png") {
-        echoAsPng($card);
-        exit;
-    }
-
-    echoAsSvg($card);
-    exit;
-}
-
-/**
- * Displays an array as JSON
- * 
- * @param array $data The data array to output
- */
-function echoAsJson(array $data): void
-{
-// set content type to JSON
-    header('Content-Type: application/json');
-    // echo JSON data
-    echo json_encode($data);
-}
-
-
 /**
  * Convert date from Y-M-D to more human-readable format
  *
@@ -334,27 +293,15 @@ function generateErrorCard(string $message, array $params = null): string
 }
 
 /**
- * Displays a card as an SVG image
+ * Converts an SVG card to a PNG image
  *
- * @param string $svg The SVG for the card to display
- */
-function echoAsSvg(string $svg): void
-{
-    // set content type to SVG image
-    header("Content-Type: image/svg+xml");
-
-    // echo SVG data for streak stats
-    echo $svg;
-}
-
-/**
- * Displays a card as a PNG image
- *
- * @param string $svg The SVG for the card to display
+ * @param string $svg The SVG for the card as a string
+ * 
+ * @return string The generated PNG data
  *
  * @throws ImagickException
  */
-function echoAsPng(string $svg): void
+function convertSvgToPng(string $svg): string
 {
     // trim off all whitespaces to make it a valid SVG string
     $svg = trim($svg);
@@ -374,11 +321,42 @@ function echoAsPng(string $svg): void
     $imagick->readImageBlob('<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $svg);
     $imagick->setFormat('png');
 
-    // echo PNG data
-    header('Content-Type: image/png');
-    echo $imagick->getImageBlob();
+    // get PNG data
+    $png = $imagick->getImageBlob();
 
     // clean up memory
     $imagick->clear();
     $imagick->destroy();
+
+    return $png;
+}
+
+/**
+ * Set headers and echo response based on type
+ *
+ * @param string|array $output The stats (array) or error message (string) to display
+ */
+function renderOutput(string|array $output): void
+{
+    $requestedType = $_REQUEST['type'] ?? 'svg';
+
+    // output JSON data
+    if ($requestedType === "json") {
+        // set content type to JSON
+        header('Content-Type: application/json');
+        // generate array from output
+        $data = gettype($output) === "string" ? array("error" => $output) : $output;
+        // output as JSON
+        echo json_encode($data);
+    }
+    // output SVG or PNG card
+    else {
+        // set content type to SVG or PNG
+        header("Content-Type: image/" . ($requestedType === "png" ? "png" : "svg+xml"));
+        // render SVG card
+        $svg = gettype($output) === "string" ? generateErrorCard($output) : generateCard($output);
+        // output PNG if PNG is requested, otherwise output SVG
+        echo $requestedType === "png" ? convertSvgToPng($svg) : $svg;
+    }
+    exit;
 }

src/index.php

@@ -40,10 +40,12 @@
     // get streak stats for user given in query string
     $contributionGraphs = getContributionGraphs($_REQUEST["user"]);
     $contributions = getContributionDates($contributionGraphs);
+    // if no contributions, display error
+    if (count($contributions) === 0) {
+        throw new AssertionError("No contributions found.");
+    }
     $stats = getContributionStats($contributions);
     renderOutput($stats);
-} catch (InvalidArgumentException $error) {
+} catch (InvalidArgumentException|AssertionError $error) {
     renderOutput($error->getMessage());
 }
-
-

src/stats.php

@@ -110,15 +110,14 @@ function getGitHubApiResponse(string $url): string
     curl_setopt($ch, CURLOPT_VERBOSE, false);
     curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
     $response = curl_exec($ch);
-
-    //Handles curl errors
-    if($response === false) {
-        if(str_contains(curl_error($ch), 'unable to get local issuer certificate')) {
-            throw new InvalidArgumentException("You don't have valid SSL Certificate installed or XAMPP.");
+    // handle curl errors
+    if ($response === false) {
+        if (str_contains(curl_error($ch), 'unable to get local issuer certificate')) {
+            throw new InvalidArgumentException("You don't have a valid SSL Certificate installed or XAMPP.");
         }
-        throw new InvalidArgumentException("Something is wrong with getGitHubApiResponse().");
+        throw new InvalidArgumentException("An error occurred when getting a response from GitHub.");
     }
-
+    // close curl handle and return response
     curl_close($ch);
     return $response;
 }
@@ -163,8 +162,8 @@ function getYearJoined(string $user): int
  */
 function getContributionStats(array $contributions): array
 {
-    $today = array_key_last($contributions) ?? date("Y-m-d");
-    $first = array_key_first($contributions) ?? date("Y-m-d");
+    $today = array_key_last($contributions);
+    $first = array_key_first($contributions);
     $stats = [
         "totalContributions" => 0,
         "firstContribution" => "",

src/themes.php

@@ -783,17 +783,17 @@
         "dates" => "#000000",
     ],
     "Javascript-dark" => [
-      "background" => "#000000FF",
-      "border" => "#F7DF1EFF",
-      "stroke" => "#F7DF1EFF",
-      "ring" => "#F7DF1EFF",
-      "currStreakNum" => "#FFFFFFFF",
-      "fire" => "#F7DF1EFF",
-      "sideNums" => "#FFFFFFFF",
-      "currStreakLabel" => "#F7DF1EFF",
-      "sideLabels" => "#F7DF1EFF",
-      "dates" => "#F7DF1EFF",
-  ],
+        "background" => "#000000FF",
+        "border" => "#F7DF1EFF",
+        "stroke" => "#F7DF1EFF",
+        "ring" => "#F7DF1EFF",
+        "currStreakNum" => "#FFFFFFFF",
+        "fire" => "#F7DF1EFF",
+        "sideNums" => "#FFFFFFFF",
+        "currStreakLabel" => "#F7DF1EFF",
+        "sideLabels" => "#F7DF1EFF",
+        "dates" => "#F7DF1EFF",
+    ],
     "noctis-minimus" => [
         "background" => "#1b2932",
         "border" => "#F0F0F0FF",